Writing pen



FIG. 1 is a right side elevational view of a writing pen in accordance with my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a right, rear perspective view thereof;

FIG. 7 is a top, front, right perspective view thereof; and

FIG. 8 is a front, left perspective view thereof;

FIG. 9 is a right side elevational view thereof shown with the top portion in a second, disconnected position;

FIG. 10 is a front elevational view thereof with the top portion shown in the second, disconnected position;

FIG. 11 is a left side elevational view thereof with the top portion shown in the second, disconnected position;

FIG. 12 is a bottom view thereof;

FIG. 13 is a top view thereof;

FIG. 14 is a right, rear perspective view thereof with the top portion shown in the second, disconnected position;

FIG. 15 is a top, front, right side perspective view thereof with the top portion shown in the disconnected position; and,

FIG. 16 is a front, left perspective view thereof with the top portion shown in the disconnected position. 

CLAIM The ornamental design for a writing pen, as shown and described. 